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Net Income Per Common Share (Tables)
3 Months Ended
Mar. 31, 2012
Net Income Per Common Share [Abstract]  
Components Of Computation Of Basic And Diluted Net Income Per Common Share
     Quarter Ended March 31  
     2012     2011  

Basic net income per common share

    

Numerator for basic net income per common share:

    

Net income

   $ 45,170      $ 34,692   

Series A and B preferred share dividends

     (5,213     (5,058

Unvested stock award participation in earnings

     (107     (129
  

 

 

   

 

 

 
   $ 39,850      $ 29,505   
  

 

 

   

 

 

 

Denominator for basic net income per common share:

    

Weighted average common shares outstanding

     89,980        71,639   

Average unvested stock awards outstanding

     (531     (457
  

 

 

   

 

 

 
     89,449        71,182   
  

 

 

   

 

 

 
   $ 0.45      $ 0.41   
  

 

 

   

 

 

 

Diluted net income per common share

    

Numerator for diluted net income per common share:

    

Net income

   $ 45,170      $ 34,692   

Dividends on antidilutive convertible preferred shares

     (5,138     (4,983

Unvested stock award participation in earnings

     (107     (129
  

 

 

   

 

 

 
   $ 39,925      $ 29,580   
  

 

 

   

 

 

 

Denominator for diluted net income per common share:

    

Weighted average common shares outstanding

     89,980        71,639   

Average unvested stock awards outstanding

     (531     (457

Net effect of dilutive stock and option awards

     102        66   

Net effect of dilutive convertible preferred shares

     308        309   
  

 

 

   

 

 

 
     89,859        71,557   
  

 

 

   

 

 

 
   $ 0.44      $ 0.41   
  

 

 

   

 

 

 
Potentially Dilutive Securities Excluded From Computation Of Net Income Per Common Share
     Quarter Ended March 31  
     2012      2011  

Antidilutive convertible preferred shares

     16,415         15,819   

Antidilutive option awards

     10         10